Question

NEED HELP ASAP!!!
WILL FAN MEDAL
Which equation shows the substitution method being used to solve the system of linear equations?



x – y = 7

x = y + 3



A.


x – (y + 3) = 7


B.


(y + 3) – y = 7


C.


x = (7 – x) + 3


D.


x – y = y + 3

Answer 1

which one do you think it is?

Answer 2

A

Answer 3

x = y + 3
plug in that for the 1 equation given for x

Answer 4

HUH

Answer 5

im so lost

Answer 6

just follow what @RyleeC said. You need to plug in y +3 to the x in the first equation
that will lead you to your answer

Answer 7

@fateal @31356 @Secret-Ninja @myininaya

Answer 8

ok still lost

Answer 9

at this point idk how to answer without giving the answer :S

Answer 10

thats fine i need a better understanding any way so i just need a better explanation

Answer 11

let me try again
Equation 1) x – y = 7
Equation 2) x = y + 3

Theses are the two equations right?
substitution method can be used like this
you plug in equation 2 into equation 1
so in equation 2 you have x = y +3
so you can just plug in equation 2 into equation 1
so it will be
x - y = 7
here x is going to get substituted
(y+3) - y = 7

Answer 12

k thx, let me work it out and can you check my answer

Answer 13

b or c

Answer 14

you got this. Hope my explanation didn't complicate it for you

Answer 15

it didnt but is it b or c?

Answer 16

answer is B

Answer 17

ok thx thx thx soo much